You me, but since you have,I’ll keep it secret from others.
A. needn’t have told
B. didn't need to tell
C. wouldn't have told
D. couldn't have told
网友回答
(答案→)A. needn’t have told
B. didn't need to tell
C. wouldn't have told
D. couldn't have told
解析：句中since you have暗示你已经告诉我了，所以用 needn’t have told表示：本不必做。